Vise-jaw



(Modem.

E. SHAW.

VISB JAW.

No. 334,055. PatenteaJan. 12, 1886. v P

'ZIM-WIW f UNITED STATES PATENT OFFICE.

EDGAR SHAW, OF LYNN, MASSACHUSETTS.

VlSE-JAW.

SPECIFICATION forming part of Letters Patent No. 334,055, dated January 12, 1886.

Application filed May 23, 1895. Serial No. 166,450. (Model.)

To all whom t may concern.-

Be it known that I, EDGAR SHAW, of Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Hand-Screws or Viso-Jaw Attachments, of which the followingisaspecication.

This invention has for its object to provide an improved adjustable surface or support for use in connection with vise-jaws, or whenever a supporting-surface capable of assuming various angles is desirable.

The invention consists in a plate or jaw having a convex boss or projection on its back, a recessed rest or socket for said boss or projection, a bolt connecting the plate and socket, (the form of the socket and bolt being such that the boss can turn in any direction therein, and thus permit the plate to assume any desired angle,) and adjustable devices whereby the plate may be supported or positively held at any of the angles to which it may be turned, as I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure l represents a side elevation of my improved device.- Fig. 2 represents a front view of the socket with the plate and its boss removed. Fig. 3 represents a rear view of the plate and its boss. Figs. 4 and 5 represent vertical sections of the entire device. Fig. 6 represents a perspective view of a part of the device. Fig. 7 represents a vertical section of a modiiication. Fig.

8 represents a section on line :v x, Fig. 5.

The same letters of reference indicate the same parts in all the figures.

In the drawings, a represents the jaw or plate, having upon its back a convex boss or protuberance, a', which is asection of a sphere.

b represents the recessed socket for the boss a, said socket being formed with'an annular seat or bearing, f', on which the boss rests, and is adapted to turn in any direction.

c represents a bolt which connects the socket-b and jaw a, said bolt havinga head, c,which is contained in a recess in the outer side of the jaw a, and a nut, c2, contained in a recess,d, in a plate at the back of the socket b. A spring, f, interposed between said nut and the inner end of the recess d permits the bolt to move endwise, and holds the boss awith a yielding pressure against its seat.

\Vithin the socket b is a plate, 7L, which contains the recess d, and is adapted to rotate freely. The front side of the plate h is dished or concaved, and is provided with a spiral or volute rib, z', extending from its inner central portion toits margin, the concave form of the surface on which the rib is formed causing said rib to gradually recede from the back of `the plate h, or advance outwardly from the The boss center ofthe plate to the bearing b. a is provided with a raised portion or shoulder, a2, the inner end of which is adapted to bear on the rib z'. It will be seen that when the shoulder a2 bears on the inner portion of the rib, as shown in Fig. 4., the jaw will necessarily be considerably inclined. By rotating the plate so as to cause the highest or outer portion ofthe rib to bear on the shoulder a2, the plate may be caused to assume the angle shown in Fig. 5. The jaw may be supported at any intermediate angle by any intermediate adjustment of the plate, as will be readily seen. The capability of both the jaw and plate to rotate on the connecting-bolt c enables the jaw to be supported at any inclination that may be desired. The support afforded by the spiral rib is of course at one side only of the connecting-bolt, and is only utilized when the pressure upon the jaw is mainly at the same side ofthe center of the jaw as the supporting portion of the rib. The plate h may be rotated by any desired means. In Fig. l I have shown a slot, o, in the socket b, through which the margin of the plate h may be reached by the operators finger, or by any suitable device for the purpose of rotating the plate, said margin being preferably milled or rougliened to facilitate the operation. Slots or enlargements p p are preferably cut in the seat, as shown in Fig. 2, each of which is formed to receive the shoulder or projection a2 on lthe boss, the edges of said projection abutting against the ends of the slot in which it is located and preventing the free rotation of the jaw without interfering with its movements to vary its inclination.

In Figs. 6 and 7 I have shown a modication of the means for supporting the jaw at various angles. In this modification I dispense with the plate hand spiral rib i, and cut the wall of the socket at s s s, Fig. 8, so as to subdivide the bearing b into a number of sec- IOO tions, and make it capable of being compressed against the boss a. A band, t, is secured at one end to the outer surface of the socket, and passes nearly around the same, its free end having a serrated cam, u, which engages with a serrated portion of the outer surface of the socket b. By suitably turning said cam the bandt may be caused to compress the sec tional wall of the socket, thus causing the bearing` b to bind upon the boss a', and hold the latter by friction in any position to which it may be adjusted. The surfaces of the boss and bearing,r may be suitably roughened, to increase the holding-power of the compressed bearing.

The socket and jaw may be attached' to a vise-jaw by any suitable means, preferably by a flange, b, formed on and projecting` back- Wardly from the socket, so as to rest on the end of a vise-jaw, and screws passed through holes in said ilange into the vise-jaw. rlhe socket may, however, be a part of the visejaw.

I claiml. The jaw or plate having,` a convex boss on its rear side, combined with a socket'having` an annular bearing` for said boss of a lesser diameter than the boss at the largest portion of the latter, so that the boss maybe tipped in any direction on said fixed bearing, a bolt connecting the jaw and socket, and devices, substantially as described, whereby the jaw niay be held or supported at any angle to which it may be adjusted on the xed annular bearing, as set forth.

2. The combination of the jaw or plate having the convex boss, the socket having the annular bearing, the connectingbolt, and the rotary plate having the spiral or volute rib formed to support a shoulder on said boss, as forth.

3. The jaw or plate having the convex boss with the shoulder or projection a2 thereon, combined with t-he socket having the annular bearing b', and the slots pp, adapted to receive said shoulder, as set forth.

In testimony whereof I have signed mynarne to this specification, inthe presence of two subscribing Witnesses, this 15th day of May, 1885.

EDGAR SHAW.

Vit-nesses:

C. F. BROWN, H. BROWN. 

